./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test21-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test21-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 05085beafc13f38fbda38ea415197838c6c50810d8ce271072546e893cc1f1e6 ...................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:28:19,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:28:19,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:28:19,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:28:19,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:28:19,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:28:19,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:28:19,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:28:19,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:28:19,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:28:19,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:28:19,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:28:19,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:28:19,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:28:19,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:28:19,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:28:19,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:28:19,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:28:19,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:28:19,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:28:19,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:28:19,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:28:19,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:28:19,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:28:19,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:28:19,739 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:28:19,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:28:19,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:28:19,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:28:19,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:28:19,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:28:19,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:28:19,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:28:19,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:28:19,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:28:19,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:28:19,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:28:19,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:28:19,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:28:19,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:28:19,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:28:19,756 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:28:19,798 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:28:19,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:28:19,799 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:28:19,799 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:28:19,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:28:19,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:28:19,801 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:28:19,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:28:19,801 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:28:19,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:28:19,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:28:19,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:28:19,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:28:19,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:28:19,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:28:19,803 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:28:19,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:28:19,803 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:28:19,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:28:19,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:28:19,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:28:19,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:28:19,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:28:19,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:28:19,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:28:19,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:28:19,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:28:19,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:28:19,806 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:28:19,806 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:28:19,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:28:19,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:28:19,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05085beafc13f38fbda38ea415197838c6c50810d8ce271072546e893cc1f1e6 [2021-10-21 19:28:20,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:28:20,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:28:20,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:28:20,102 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:28:20,103 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:28:20,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/ldv-regression/test21-1.c [2021-10-21 19:28:20,209 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/data/8cb609dba/9d8ecddbf9b14237b66550f7c715b26b/FLAGd78681535 [2021-10-21 19:28:20,643 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:28:20,644 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/sv-benchmarks/c/ldv-regression/test21-1.c [2021-10-21 19:28:20,656 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/data/8cb609dba/9d8ecddbf9b14237b66550f7c715b26b/FLAGd78681535 [2021-10-21 19:28:21,035 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/data/8cb609dba/9d8ecddbf9b14237b66550f7c715b26b [2021-10-21 19:28:21,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:28:21,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:28:21,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:28:21,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:28:21,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:28:21,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:28:21" (1/1) ... [2021-10-21 19:28:21,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7495f7d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:21, skipping insertion in model container [2021-10-21 19:28:21,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:28:21" (1/1) ... [2021-10-21 19:28:21,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:28:21,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:28:21,233 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/sv-benchmarks/c/ldv-regression/test21-1.c[892,905] [2021-10-21 19:28:21,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:28:21,245 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:28:21,258 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/sv-benchmarks/c/ldv-regression/test21-1.c[892,905] [2021-10-21 19:28:21,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:28:21,272 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:28:21,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:21 WrapperNode [2021-10-21 19:28:21,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:28:21,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:28:21,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:28:21,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:28:21,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:21" (1/1) ... [2021-10-21 19:28:21,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:21" (1/1) ... [2021-10-21 19:28:21,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:28:21,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:28:21,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:28:21,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:28:21,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:21" (1/1) ... [2021-10-21 19:28:21,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:21" (1/1) ... [2021-10-21 19:28:21,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:21" (1/1) ... [2021-10-21 19:28:21,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:21" (1/1) ... [2021-10-21 19:28:21,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:21" (1/1) ... [2021-10-21 19:28:21,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:21" (1/1) ... [2021-10-21 19:28:21,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:21" (1/1) ... [2021-10-21 19:28:21,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:28:21,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:28:21,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:28:21,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:28:21,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:21" (1/1) ... [2021-10-21 19:28:21,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:28:21,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:21,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:28:21,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:28:21,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:28:21,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:28:21,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:28:21,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:28:21,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:28:21,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:28:21,738 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:28:21,740 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-21 19:28:21,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:28:21 BoogieIcfgContainer [2021-10-21 19:28:21,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:28:21,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:28:21,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:28:21,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:28:21,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:28:21" (1/3) ... [2021-10-21 19:28:21,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b17301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:28:21, skipping insertion in model container [2021-10-21 19:28:21,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:28:21" (2/3) ... [2021-10-21 19:28:21,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b17301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:28:21, skipping insertion in model container [2021-10-21 19:28:21,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:28:21" (3/3) ... [2021-10-21 19:28:21,758 INFO L111 eAbstractionObserver]: Analyzing ICFG test21-1.c [2021-10-21 19:28:21,771 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:28:21,772 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:28:21,823 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:28:21,830 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:28:21,830 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:28:21,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:21,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:28:21,850 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:21,850 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:21,851 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:28:21,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:21,857 INFO L82 PathProgramCache]: Analyzing trace with hash 167538580, now seen corresponding path program 1 times [2021-10-21 19:28:21,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:21,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684327175] [2021-10-21 19:28:21,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:21,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:28:22,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:22,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684327175] [2021-10-21 19:28:22,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684327175] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:28:22,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:28:22,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 19:28:22,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485974281] [2021-10-21 19:28:22,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:28:22,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:22,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:28:22,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:28:22,334 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:22,768 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-10-21 19:28:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:28:22,770 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-21 19:28:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:22,776 INFO L225 Difference]: With dead ends: 67 [2021-10-21 19:28:22,777 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:28:22,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 354.3ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:28:22,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:28:22,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:28:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:28:22,803 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-10-21 19:28:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:22,804 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:28:22,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:28:22,804 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:28:22,807 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:28:22,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:28:22,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-21 19:28:22,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:28:22,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:28:22,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:28:22,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:28:22,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:28:22,836 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-21 19:28:22,837 INFO L853 garLoopResultBuilder]: At program point L29(lines 27 30) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_check_#res|) (= ULTIMATE.start_main_~pd1~0.base ULTIMATE.start_main_~pd2~0.base) (= ULTIMATE.start_main_~pd2~0.offset ULTIMATE.start_main_~pd1~0.offset)) [2021-10-21 19:28:22,837 INFO L857 garLoopResultBuilder]: For program point L13(lines 13 20) no Hoare annotation was computed. [2021-10-21 19:28:22,837 INFO L853 garLoopResultBuilder]: At program point L38(lines 33 46) the Hoare annotation is: false [2021-10-21 19:28:22,837 INFO L857 garLoopResultBuilder]: For program point L36(lines 36 40) no Hoare annotation was computed. [2021-10-21 19:28:22,838 INFO L857 garLoopResultBuilder]: For program point L36-2(lines 36 40) no Hoare annotation was computed. [2021-10-21 19:28:22,838 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-21 19:28:22,838 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-21 19:28:22,838 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-21 19:28:22,838 INFO L857 garLoopResultBuilder]: For program point L24(line 24) no Hoare annotation was computed. [2021-10-21 19:28:22,838 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2021-10-21 19:28:22,839 INFO L857 garLoopResultBuilder]: For program point L24-2(line 24) no Hoare annotation was computed. [2021-10-21 19:28:22,839 INFO L860 garLoopResultBuilder]: At program point L24-3(lines 22 25) the Hoare annotation is: true [2021-10-21 19:28:22,839 INFO L857 garLoopResultBuilder]: For program point L24-4(line 24) no Hoare annotation was computed. [2021-10-21 19:28:22,839 INFO L857 garLoopResultBuilder]: For program point L24-6(line 24) no Hoare annotation was computed. [2021-10-21 19:28:22,839 INFO L860 garLoopResultBuilder]: At program point L24-7(lines 22 25) the Hoare annotation is: true [2021-10-21 19:28:22,839 INFO L860 garLoopResultBuilder]: At program point L45(lines 32 46) the Hoare annotation is: true [2021-10-21 19:28:22,840 INFO L857 garLoopResultBuilder]: For program point L37(lines 37 39) no Hoare annotation was computed. [2021-10-21 19:28:22,844 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:28:22,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:28:22 BoogieIcfgContainer [2021-10-21 19:28:22,857 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:28:22,858 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:28:22,858 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:28:22,858 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:28:22,859 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:28:21" (3/4) ... [2021-10-21 19:28:22,861 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:28:22,872 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-21 19:28:22,872 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-21 19:28:22,872 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:28:22,873 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:28:22,896 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (1 <= \result && pd1 == pd2) && pd2 == pd1 [2021-10-21 19:28:22,916 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:28:22,916 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:28:22,918 INFO L168 Benchmark]: Toolchain (without parser) took 1878.31 ms. Allocated memory was 102.8 MB in the beginning and 130.0 MB in the end (delta: 27.3 MB). Free memory was 68.6 MB in the beginning and 75.2 MB in the end (delta: -6.6 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:22,918 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 102.8 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:28:22,919 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.02 ms. Allocated memory is still 102.8 MB. Free memory was 68.4 MB in the beginning and 76.9 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:22,919 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.80 ms. Allocated memory is still 102.8 MB. Free memory was 76.5 MB in the beginning and 75.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:28:22,920 INFO L168 Benchmark]: Boogie Preprocessor took 22.35 ms. Allocated memory is still 102.8 MB. Free memory was 74.9 MB in the beginning and 73.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:22,920 INFO L168 Benchmark]: RCFGBuilder took 409.54 ms. Allocated memory is still 102.8 MB. Free memory was 73.8 MB in the beginning and 63.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:22,921 INFO L168 Benchmark]: TraceAbstraction took 1112.79 ms. Allocated memory was 102.8 MB in the beginning and 130.0 MB in the end (delta: 27.3 MB). Free memory was 62.6 MB in the beginning and 77.9 MB in the end (delta: -15.3 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:22,921 INFO L168 Benchmark]: Witness Printer took 58.44 ms. Allocated memory is still 130.0 MB. Free memory was 77.9 MB in the beginning and 75.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:22,924 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 102.8 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 233.02 ms. Allocated memory is still 102.8 MB. Free memory was 68.4 MB in the beginning and 76.9 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.80 ms. Allocated memory is still 102.8 MB. Free memory was 76.5 MB in the beginning and 75.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.35 ms. Allocated memory is still 102.8 MB. Free memory was 74.9 MB in the beginning and 73.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 409.54 ms. Allocated memory is still 102.8 MB. Free memory was 73.8 MB in the beginning and 63.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1112.79 ms. Allocated memory was 102.8 MB in the beginning and 130.0 MB in the end (delta: 27.3 MB). Free memory was 62.6 MB in the beginning and 77.9 MB in the end (delta: -15.3 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. * Witness Printer took 58.44 ms. Allocated memory is still 130.0 MB. Free memory was 77.9 MB in the beginning and 75.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 44]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1022.5ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 8.8ms, AutomataDifference: 475.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 28.5ms, InitialAbstractionConstructionTime: 10.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12 SDtfs, 72 SDslu, 77 SDs, 0 SdLazy, 102 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 101.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 354.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 20 NumberOfFragments, 14 HoareAnnotationTreeSize, 5 FomulaSimplifications, 55 FormulaSimplificationTreeSizeReduction, 14.4ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 7.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 11.8ms SsaConstructionTime, 58.2ms SatisfiabilityAnalysisTime, 293.6ms InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 52 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (1 <= \result && pd1 == pd2) && pd2 == pd1 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-21 19:28:22,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22423ea8-aa51-4b74-95d7-0e8c53aff3bc/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...